Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c97e5b019310c86…

MALICIOUS

PDF

45.0 KB Created: 2021-06-04 03:42:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0fb0788c022f10e08c1753ff3bd891ea SHA-1: 65bb572e9cc8c5a5f8bd3a21495559d9f745c1bd SHA-256: 0c97e5b019310c86827817d7325da263ba36cbd19bc6739b10b7823343580b6a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are presented as 'game hacks' or generators. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of such links, suggesting a link farm designed to attract users with promises of free in-game items. The primary URL, 'https://netcdn.online/app/406889139/coin-master-hack-mod-apk-free-download-game-hack', is a strong indicator of a lure for potentially malicious content. No scripts were extracted, but the document's structure and content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-hack-mod-apk-free-download-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pokemon-go-free-clothes-code_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/make-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-price-in-nepal_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005173.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5173 25880 bytes
SHA-256: 16fc722656dcc3b86eba3dca473ed1e909376abecb6cfe993af80b250d131659
font_01_sfnt_off00008c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5A 18636 bytes
SHA-256: f35a088bb389889b7dbdb2955ea981e64c4ac43926c2f49735e1909520ee0b52

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